Implement aura::WindowPortMus::CreateCompositorFrameSink()

services/ui/ws/window_tree.cc

Index: services/ui/ws/window_tree.cc
diff --git a/services/ui/ws/window_tree.cc b/services/ui/ws/window_tree.cc
index 6e8ca14a421a5a729f2a2af57c3b8458ef08f10f..9303fb77c2c4926058b30581601a99fc36073702 100644
--- a/services/ui/ws/window_tree.cc
+++ b/services/ui/ws/window_tree.cc
@@ -951,14 +951,9 @@ void WindowTree::ProcessTransientWindowRemoved(
 void WindowTree::ProcessWindowSurfaceChanged(
     ServerWindow* window,
     const cc::SurfaceInfo& surface_info) {
-  ServerWindow* parent_window = window->parent();
-  ClientWindowId client_window_id, parent_client_window_id;
-  if (!IsWindowKnown(window, &client_window_id) ||
-      !IsWindowKnown(parent_window, &parent_client_window_id) ||
-      !created_window_map_.count(parent_window->id())) {
+  ClientWindowId client_window_id;
+  if (!IsWindowKnown(window, &client_window_id))
     return;
-  }
-
   client()->OnWindowSurfaceChanged(client_window_id.id, surface_info);
 }